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Accessibility in Motion: Measuring Real-Time Accessibility With High-Resolution Data- [electronic resource]
Accessibility in Motion: Measuring Real-Time Accessibility With High-Resolution Data - [el...
Accessibility in Motion: Measuring Real-Time Accessibility With High-Resolution Data- [electronic resource]

Detailed Information

자료유형  
 학위논문파일 국외
최종처리일시  
20240214101943
ISBN  
9798380370356
DDC  
338.9
저자명  
Liu, Luyu.
서명/저자  
Accessibility in Motion: Measuring Real-Time Accessibility With High-Resolution Data - [electronic resource]
발행사항  
[S.l.]: : The Ohio State University., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(197 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
주기사항  
Advisor: Miller, Harvey J.
학위논문주기  
Thesis (Ph.D.)--The Ohio State University, 2023.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약Accessibility is a fundamental measure in public transportation research and policy making; it represents a user's ability to travel and reach destination afforded by a public transit service. Accessibility plays a crucial role in a public transit service's useability, a community's livability, and residents' well-being. Higher accessibility can promote modal shifts from other unsustainable transportation to public transit, which decreases the carbon and air pollution, curbs congestion, and improves social equity and public health. However, many US cities still have major gaps in public transit accessibility and reliability. The issue of inadequate public transportation accessibility and reliability also remains a grave concern for scientific and planning communities: the lack of in-depth, holistic, and reliable understanding of accessibility impedes our ability to make informed and evidence-based decisions during both the planning and operation phases.In this dissertation, I introduce a new research framework - real-time accessibility - to better understand and improve public transit systems with high-resolution real-time geospatial data. The framework utilizes real-time information to assess different dimensions of system performance of public transit services and behaviors of passengers in the systems. I investigate four empirical questions with the framework based on the Central Ohio Transit Authority (COTA) bus system in Columbus, Ohio, a low-frequency bus system in a typical mid-size car-dependent city. First, I study the impact of new dockless scooter sharing services on local public transit systems. While they can significantly improve accessibility, equity and sustainability issues such as uneven distribution, high cost, and low capacity limit the collaboration between public transit and scooters. Second, I study the unreliability of public transit systems and the unrealistic assumptions made by schedule-based and retrospective-based measures used by researchers and planners leveraging new high-resolution public transit data. I introduce a more realistic measure - realizable real-time accessibility - based on the space-time prism concept from time geography. I find that public transit accessibility is highly unreliable, and realizable accessibility is the most conservative and realistic measure, which provides a more robust guide for transit planning. Third, I examine the impacts of short- and longterm disruptions on the accessibility and reliability in the COTA bus system with the same realizable accessibility and unreliability measures introduced in the last paper. I study Ohio State football games and the COVID-19 as examples for short- and long-term disruptions, respectively. The method effectively detects that football games caused system disturbances and COVID-19 had persistent negative impacts on accessibility and reliability. Fourth, in response to the higher frequencies and uncertainties of future disruptions, I introduce accessibility derivative, a measure that calculates the change in system-wide accessibility from an elemental change in the transit system's inputs. The system provides crucial information about the direct impacts of potential disruptions and service cuts on overall accessibility, as well as each route's contribution to accessibility. This dissertation makes conceptual and analytical contributions to offer a more realistic, holistic, and evidence-based approach to evaluate public transit accessibility and reliability. Furthermore, the methods and results can also guide planners and policymakers in evaluating and redesigning transit systems to improve accessibility, service performance, and capacity.
일반주제명  
Sustainability.
일반주제명  
Transportation.
일반주제명  
Geography.
일반주제명  
Geographic information science.
일반주제명  
Urban planning.
키워드  
Accessibility
키워드  
Public transit
키워드  
Geospatial data science
키워드  
Micromobility
키워드  
Real-time data
키워드  
Reliability
기타저자  
The Ohio State University Geography
기본자료저록  
Dissertations Abstracts International. 85-03B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
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MARC

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■1001  ▼aLiu,  Luyu.
■24510▼aAccessibility  in  Motion:  Measuring  Real-Time  Accessibility  With  High-Resolution  Data▼h[electronic  resource]
■260    ▼a[S.l.]:▼bThe  Ohio  State  University.  ▼c2023
■260  1▼aAnn  Arbor  :▼bProQuest  Dissertations  &  Theses,  ▼c2023
■300    ▼a1  online  resource(197  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-03,  Section:  B.
■500    ▼aAdvisor:  Miller,  Harvey  J.
■5021  ▼aThesis  (Ph.D.)--The  Ohio  State  University,  2023.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aAccessibility  is  a  fundamental  measure  in  public  transportation  research  and  policy  making;  it  represents  a  user's  ability  to  travel  and  reach  destination  afforded  by  a  public  transit  service.  Accessibility  plays  a  crucial  role  in  a  public  transit  service's  useability,  a  community's  livability,  and  residents'  well-being.  Higher  accessibility  can  promote  modal  shifts  from  other  unsustainable  transportation  to  public  transit,  which  decreases  the  carbon  and  air  pollution,  curbs  congestion,  and  improves  social  equity  and  public  health.  However,  many  US  cities  still  have  major  gaps  in  public  transit  accessibility  and  reliability.  The  issue  of  inadequate  public  transportation  accessibility  and  reliability  also  remains  a  grave  concern  for  scientific  and  planning  communities:  the  lack  of  in-depth,  holistic,  and  reliable  understanding  of  accessibility  impedes  our  ability  to  make  informed  and  evidence-based  decisions  during  both  the  planning  and  operation  phases.In  this  dissertation,  I  introduce  a  new  research  framework  -  real-time  accessibility  -  to  better  understand  and  improve  public  transit  systems  with  high-resolution  real-time  geospatial  data.  The  framework  utilizes  real-time  information  to  assess  different  dimensions  of  system  performance  of  public  transit  services  and  behaviors  of  passengers  in  the  systems.  I  investigate  four  empirical  questions  with  the  framework  based  on  the  Central  Ohio  Transit  Authority  (COTA)  bus  system  in  Columbus,  Ohio,  a  low-frequency  bus  system  in  a  typical  mid-size  car-dependent  city.  First,  I  study  the  impact  of  new  dockless  scooter  sharing  services  on  local  public  transit  systems.  While  they  can significantly  improve  accessibility,  equity  and  sustainability  issues  such  as  uneven  distribution,  high  cost,  and  low  capacity  limit  the  collaboration  between  public  transit  and  scooters.  Second,  I  study  the  unreliability  of  public  transit  systems  and  the  unrealistic  assumptions  made  by  schedule-based  and  retrospective-based  measures  used  by  researchers  and  planners  leveraging  new  high-resolution  public  transit  data.  I  introduce  a  more  realistic  measure  -  realizable  real-time  accessibility  -  based  on  the  space-time  prism  concept  from  time  geography.  I  find  that  public  transit  accessibility  is  highly  unreliable,  and  realizable  accessibility  is  the  most  conservative  and  realistic  measure,  which  provides  a  more  robust  guide  for  transit  planning.  Third,  I  examine  the  impacts  of  short-  and  longterm  disruptions  on  the  accessibility  and  reliability  in  the  COTA  bus  system  with  the  same  realizable  accessibility  and  unreliability  measures  introduced  in  the  last  paper.  I  study  Ohio  State  football  games  and  the  COVID-19  as  examples  for  short-  and  long-term  disruptions,  respectively.  The  method  effectively  detects  that  football  games  caused  system  disturbances  and  COVID-19  had  persistent  negative  impacts  on  accessibility  and  reliability.  Fourth,  in  response  to  the  higher  frequencies  and  uncertainties  of  future  disruptions,  I  introduce  accessibility  derivative,  a  measure  that  calculates  the  change  in  system-wide  accessibility  from  an  elemental  change  in  the  transit  system's  inputs.  The  system  provides  crucial  information  about  the  direct  impacts  of  potential  disruptions  and  service  cuts  on  overall  accessibility,  as  well  as  each  route's  contribution  to  accessibility.  This  dissertation  makes  conceptual  and  analytical  contributions  to  offer  a  more  realistic,  holistic,  and  evidence-based  approach  to  evaluate  public  transit  accessibility  and  reliability.  Furthermore,  the  methods  and  results  can  also  guide  planners  and  policymakers  in evaluating  and  redesigning  transit  systems  to  improve  accessibility,  service  performance,  and  capacity.
■590    ▼aSchool  code:  0168.
■650  4▼aSustainability.
■650  4▼aTransportation.
■650  4▼aGeography.
■650  4▼aGeographic  information  science.
■650  4▼aUrban  planning.
■653    ▼aAccessibility
■653    ▼aPublic  transit
■653    ▼aGeospatial  data  science
■653    ▼aMicromobility
■653    ▼aReal-time  data
■653    ▼aReliability
■690    ▼a0999
■690    ▼a0640
■690    ▼a0709
■690    ▼a0370
■690    ▼a0366
■71020▼aThe  Ohio  State  University▼bGeography.
■7730  ▼tDissertations  Abstracts  International▼g85-03B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0168
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16935523▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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